Francis W. Porretto contemplates the distance from right this minute to the end of time:
We have been told very little authoritatively about Heaven, but its nature surely includes release from bondage to Time. Nothing else would be consistent with a state of eternal bliss. Indeed, an immortal sentenced to temporal eternity would find it to be the most extreme imaginable torment. Time is the medium of desire, effort, fulfillment, failure, and mortality; to compel an immortal, unalterable creature to endure it would utterly destroy any delight he might be offered within its folds.
At the very least, said creature might well be bored out of his skull. Several MLP:FiM fanfics have envisioned Celestia, having outlived everypony in Equestria other than her sister, trying to conjure up a way to bring on her own death and get it over with already; canon does not state that the diarchs are in fact immortal, but they do seem to hang around for an awfully long time. (When the series opens, said sister has been banished for the past thousand years, which more than meets my definition of “awfully long time.”)
And I find myself asking: does it become easier to accept the eventual end of your temporal existence when you know it can’t be far away? Should I be able to deal with it better at 61 than I was at 21? Because so far, I’m not.